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 0001437749-20-017142-index-headers.html | 2020-08-07 21:27:54 | |
| 0001437749-20-017142-index.html | 2020-08-07 21:27:54 | |
| 0001437749-20-017142.txt | 2020-08-07 21:27:54 | |
 0001437749-20-017142-xbrl.zip | 104181 | 2020-08-07 21:27:54 |
| ex_194010.htm | 10572 | 2020-08-07 21:27:54 |
| ex_194732.htm | 10589 | 2020-08-07 21:27:54 |
| ex_194733.htm | 5186 | 2020-08-07 21:27:54 |
| ex_194734.htm | 5199 | 2020-08-07 21:27:54 |
| FilingSummary.xml | 24094 | 2020-08-07 21:27:54 |
| Financial_Report.xlsx | 45780 | 2020-08-07 21:27:54 |
| MetaLinks.json | 401931 | 2020-08-07 21:27:54 |
| npk-20200628.xsd | 32650 | 2020-08-07 21:27:54 |
| npk-20200628_cal.xml | 44069 | 2020-08-07 21:27:54 |
| npk-20200628_def.xml | 235492 | 2020-08-07 21:27:54 |
| npk-20200628_lab.xml | 213293 | 2020-08-07 21:27:54 |
| npk-20200628_pre.xml | 256970 | 2020-08-07 21:27:54 |
| npk20200713_10q.htm | 786662 | 2020-08-07 21:27:54 |
| npk20200713_10q_htm.xml | 556229 | 2020-08-07 21:27:54 |
| R1.htm | 52476 | 2020-08-07 21:27:54 |
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| R27.htm | 23137 | 2020-08-07 21:27:54 |
| R28.htm | 15984 | 2020-08-07 21:27:54 |
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| R32.htm | 18828 | 2020-08-07 21:27:54 |
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| R6.htm | 39023 | 2020-08-07 21:27:54 |
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| R8.htm | 5851 | 2020-08-07 21:27:54 |
| R9.htm | 7352 | 2020-08-07 21:27:54 |
| report.css | 2767 | 2020-08-07 21:27:54 |
| Show.js | 1085 | 2020-08-07 21:27:54 |